HCG Pregnancy Dating Formula:
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HCG (Human Chorionic Gonadotropin) pregnancy dating uses hormone levels to estimate gestational age. At approximately 5 weeks, hCG levels typically range from 18 to 7,340 mIU/mL, providing an important marker for early pregnancy assessment.
The calculator uses established hCG ranges for pregnancy dating:
Where:
Explanation: hCG levels double approximately every 48-72 hours in early pregnancy, making them useful for estimating gestational age and monitoring pregnancy progression.
Details: Regular hCG monitoring helps confirm pregnancy viability, detect potential complications like ectopic pregnancy or miscarriage, and ensure proper fetal development during early gestation.
Tips: Enter hCG level in mIU/mL. The calculator will estimate gestational age based on established ranges. Always consult with healthcare providers for accurate pregnancy dating and monitoring.
Q1: How accurate is hCG for dating pregnancy?
A: hCG provides good estimation in early pregnancy but becomes less reliable after 6-7 weeks when ultrasound becomes more accurate for dating.
Q2: What if my hCG level is outside the 5-week range?
A: Levels outside this range may indicate different gestational age or require further medical evaluation. Always consult your healthcare provider.
Q3: How often should hCG levels be tested?
A: Testing frequency depends on clinical situation. Typically, levels are checked every 48-72 hours in early pregnancy to monitor doubling time.
Q4: Can hCG levels vary between pregnancies?
A: Yes, hCG levels can vary significantly between individuals and even between different pregnancies in the same person.
Q5: What other factors affect hCG levels?
A: Multiple gestation, molar pregnancy, and certain medical conditions can affect hCG levels. Always interpret results in clinical context.